I have windows vista and I got the same error.
microsoft Visual C++ Runtime Error
Runtime Error!
Program: C:\Program Files\SmartFTP\SmartFTP.exe

It says this app. has requested the runtime to terminate it in an unusual way.

I read ur post but I don't know how to get to the registration key all I know how to do is right click on the application and I didn't see the registration key there so could u please explain. Please I need the really in depth description on how to fix this bug